Is 612 spans as long as The Circumfrence of Earth?
It's about one-three-hundred-thousandth as long as The Circumfrence of Earth
The length of The Circumfrence of Earth is about 175,306,270 spans.
(Equatorial)
The Earth — not a perfect sphere, but rather an oblate spheroid with bulged middle — has an Equatorial circumference of approximately 175,306,270 spans. The first airplane trip around the circumference of the Earth (with a few stops along the way), was completed in 1924 by the United States Army Air Service, and took 175 days.
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